STM32F103T8 STMicroelectronics, STM32F103T8 Datasheet - Page 12

• Manufacturer Part Number: STM32F103T8
• Description: Mainstream Performance line, ARM Cortex-M3 MCU with 64 Kbytes Flash, 72 MHz CPU, motor control, USB and CAN
• Manufacturer: STMicroelectronics

Specifications of STM32F103T8

• Conversion Range: 0 to 3.6 V
• Peripherals Supported: timers, ADC, SPIs, I2Cs and USARTs

Description
12/99
Figure 2.
1. When the HSI is used as a PLL clock input, the maximum system clock frequency that can be achieved is
2. For the USB function to be available, both HSE and PLL must be enabled, with USBCLK running at 48
3. To have an ADC conversion time of 1 µs, APB2 must be at 14 MHz, 28 MHz or 56 MHz.
64 MHz.
MHz.
OSC32_OUT
OSC32_IN
OSC_OUT
OSC_IN
MCO
Clock tree
4-16 MHz
32.768 kHz
HSE OSC
Main
Clock Output
LSE OSC
HSI RC
8 MHz
LSI RC
40 kHz
PLLSRC
MCO
x2, x3, x4
PLLMUL
HSI
..., x16
PLLXTPRE
PLL
/2
/128
Doc ID 13587 Rev 13
LSE
LSI
/2
RTCSEL[1:0]
/2
HSE
PLLCLK
SYSCLK
HSI
PLLCLK
RTCCLK
to Independent Watchdog (IWDG)
HSI
HSE
CSS
SW
SYSCLK
72 MHz
to RTC
max
IWDGCLK
Prescaler
/1, 2..512
AHB
Prescaler
/1, 1.5
FLITFCLK
to Flash programming interface
USB
TIM1 timer
If (APB2 prescaler =1) x1
else
/1, 2, 4, 8, 16
/1, 2, 4, 8, 16
TIM2,3, 4
If (APB1 prescaler =1) x1
else
/8
Prescaler
Prescaler
72 MHz max
APB2
APB1
STM32F103x8, STM32F103xB
Prescaler
/2, 4, 6, 8
Clock
Enable (3 bits)
ADC
48 MHz
Legend:
HSE = high-speed external clock signal
HSI = high-speed internal clock signal
LSI = low-speed internal clock signal
LSE = low-speed external clock signal
72 MHz max
36 MHz max
ADCCLK
Peripheral Clock
Peripheral Clock
Enable (13 bits)
Enable (11 bits)
x2
USBCLK
to USB interface
x2
HCLK
to AHB bus, core,
memory and DMA
FCLK Cortex
free running clock
to Cortex System timer
Peripheral Clock
Enable (1 bit)
Peripheral Clock
Enable (3 bits)
TIM1CLK
TIMXCLK
PCLK1
PCLK2
to APB1
peripherals
to APB2
peripherals
to TIM2, 3
and 4
to ADC
to TIM1
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